Inhibition of nutrient- and high pressure-induced germination of Bacillus cereus spores by plant essential oils

Corthouts, Jorinde; Michiels, Chris W.

doi:10.1016/j.ifset.2016.02.011

Cited by 11 publications

(2 citation statements)

References 63 publications

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“…Therefore, necessary nutrients shall be provided to promote the formation of vegetative cells, particularly in the later stage of germination. However, some studies , have shown that nutrients may inhibit the early germination of microbial spores, and so the germination of spores should be investigated by providing both germinants and nutrients at the same time. Figure D shows that the germination rate of spores was 50.2% after 120 min of germination when only nutrients (and no germinants) were added in the germination medium (Control 2).…”

Section: Resultsmentioning

confidence: 99%

Optimization of Sporulation and Germination Conditions of Functional Bacteria for Concrete Crack-Healing and Evaluation of their Repair Capacity

Jiang

Jia

Wang

et al. 2020

ACS Appl. Mater. Interfaces

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While microbial spore production and germination of bacteria have been widely studied for their applications in animal husbandry, aquatic products, medicine, and food, few studies have investigated their use for the crack-healing of concrete. To effectively heal the cracks in concrete, studies suggest that the rate of sporulation and the germination of bacteria should be sufficiently high. This study investigates the effects of different carbon sources, nitrogen sources, Mn 2+ concentrations, and external culture conditions on the sporulation rate and analyzes the effects of the pH value, heat activation, germinants, various cations, and nutrients on the germination of spores. Bacillus cohnii (B. cohnii) is chosen as the bacterium to be mixed in concrete because of its alkalophilic nature. The mineralization activity of spores after germination and the crack-healing capacity of concrete are studied. The optimal culture medium and the optimum external conditions for spore production are obtained. The total cell count and sporulation rate of bacteria obtained on this medium are 3.14 × 10 9 CFU/mL and 92.6%, respectively, under the optimum external conditions. The optimal pH value for the spore germination of B. cohnii is 9.7. While the cation Na + strongly stimulates the germination of B. cohnii spores, other cations (such as K + , NH 4 + , and Ca 2+ ) do not stimulate spore germination. The optimal concentration of Na + is 200 mM. The germination rate of spores in the control group concrete specimen (room temperature 24°C) was more than 50%, thus suggesting that B. cohnii bacteria can be used in the self-healing of concrete cracks. The mineralization activity test proves that the spores of B. cohnii have a mineralizing function after germination, and the crystals produced by microbial-induced carbonate precipitation (MICP) are of pure calcite. When the crack width of the concrete specimen with spores of B. cohnii is less than 1.2 mm, it can be completely repaired after 28 days of healing.

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Section: Resultsmentioning

confidence: 99%

Optimization of Sporulation and Germination Conditions of Functional Bacteria for Concrete Crack-Healing and Evaluation of their Repair Capacity

Jiang

Jia

Wang

et al. 2020

ACS Appl. Mater. Interfaces

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“…The diameter of inhibition zones, including the disc diameter, is considered as weak (10–13.9 mm), moderate (14–18 mm), or strong (>18 mm), according to [ 107 ]. Another rosewood oil sample, purchased from Anthémis Aromatherapie (Oosterstreek, The Netherlands), was evaluated by the broth dilution method against B. cereus and showed MIC value 1.0% to vegetative cells and MIC value >1.00% to spore germination [ 134 ].…”

Section: Biological Activitiesmentioning

confidence: 99%

Chemical Diversity and Therapeutic Effects of Essential Oils of Aniba Species from the Amazon: A Review

Trindade

Xavier

Setzer

et al. 2021

Plants

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Lauraceae families have great diversity in the world’s tropical regions and are represented mainly by aromatic shrubs and trees with significant production of essential oils (EOs). This work presents a review of the EO chemical profiles from specimens of Aniba, including their seasonal variations, geographical distributions, and biological activities in the Amazon biome. Based on the survey, 15 species were reviewed, representing 167 oil samples extracted from leaves, twig barks, and woods. Brazilian Amazon was the most representative geographic area in the number of specimens, highlighting the locations Belém, (Pará state, PA) (3 spp., 37 samples), Santarém (PA) (3 spp., 10 samples), Carajás (PA) (3 spp., 7 samples), and Manaus (Amazonas state, AM) (3 spp., 16 samples). The main compound classes identified in oils were benzenoids and phenylpropanoids, represented by 1-nitro-2-phenylethane, benzyl salicylate, benzyl benzoate and methyleugenol, along with terpenoids, especially monoterpenes and sesquiterpenes, such as linalool, α-phellandrene, β-phellandrene, β-selinene, and spathulenol. The EOs from Aniba showed considerable variation in the chemical profiles according to season and collection site. The hierarchical cluster analysis classified the samples into two main groups according to chemical composition. This review highlights its comprehensive and up-to-date information on history, conservation, traditional uses, chemosystematics, pharmacological potential of Aniba species.

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Eskin¹,

Clough²,

List³

2016

Lipid Technology

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The composition and properties of roll-in shortenings rich in saturated and trans acids were examined and compared to other specialty fats. Triacylgylcerol (TAG) and fatty acid composition as well as polymorphic and melting behavior were determined along with solid fat content and deformation rheological properties. Roll-in shortenings contained higher level of tristaturated and unsaturated TAGS compared to other shortenings All exhibited high levels of saturates and trans acids as well as similar crystal characteristics consisting of beta prime or mixed beta prime/beta. Irrespective of their end use, roll-in shortenings had comparable melting peaks but sharper melting endotherms and higher enthalpies which are attributed to well-defined short spacings, indicative of smaller crystals and more ordered packing. Solid fat profiles of roll in shortenings were similar to all-purpose and interesterified cake products but not to all-purpose and icing shortenings. /gl Braulio, M., Marangoni, A., J. Am. Oil Chem. Soc. 2016, 93, 575-585. Method to develop high oleic soybeans using conventional soybean breeding techniquesThis invention relates to a soybean plant with mutations in FAD2-1A and FAD2-1B and is directed to seeds and plants with altered ratios of monounsaturated and poly unsaturated fatty acids. The present disclosure is directed to plants exhibiting elevated levels of oleic acid. /gl Bilyeu, K. et al., US Patent 9 198 365, 2015.

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Inhibition of nutrient- and high pressure-induced germination of Bacillus cereus spores by plant essential oils

Cited by 11 publications

References 63 publications

Optimization of Sporulation and Germination Conditions of Functional Bacteria for Concrete Crack-Healing and Evaluation of their Repair Capacity

Optimization of Sporulation and Germination Conditions of Functional Bacteria for Concrete Crack-Healing and Evaluation of their Repair Capacity

Chemical Diversity and Therapeutic Effects of Essential Oils of Aniba Species from the Amazon: A Review

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